Pre-ejaculate is a fluid that is secreted from men during sexual arousal.

The bulbourethral gland plays an important role in the male reproductive system.

That man is my father.

The Skene's gland is a part of the female reproductive system, and its function is not yet fully understood.

Time flies, doesn't it?

He started to get excited when the concert began.

I got excited when I heard his voice.

This plant secretes a special liquid.

His body started excessive secretion in response to stress.

This bottle contains an unknown liquid.